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From
Mike Bown

We have had the fly-in-the-urinal “nudge” (22 June, p 32) and the historic use of a bee (13 July, p 33) to influence men’s aim for the better. In Slovenia I discovered a urinal with a tiny set of soccer goalposts and a ball suspended by a thread from the crossbar – irresistible!

Does this count as a nudge? A bar in Berlin has a sign proclaiming that “the man who picks the fag-ends out of the urinals also puts the ice in the drinks”.